Prepare widespread unicode literal use

test/test_unicode_literals.py

@@ -0,0 +1,40 @@
+from __future__ import unicode_literals
+
+import io
+import os
+import re
+import unittest
+
+rootDir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+
+
+class TestUnicodeLiterals(unittest.TestCase):
+    def test_all_files(self):
+        print('Skipping this test (not yet fully implemtned)')
+        return
+
+        for dirpath, _, filenames in os.walk(rootDir):
+            for basename in filenames:
+                if not basename.endswith('.py'):
+                    continue
+                fn = os.path.join(dirpath, basename)
+                with io.open(fn, encoding='utf-8') as inf:
+                    code = inf.read()
+
+                if "'" not in code and '"' not in code:
+                    continue
+                imps = 'from __future__ import unicode_literals'
+                self.assertTrue(
+                    imps in code,
+                    ' %s  missing in %s' % (imps, fn))
+
+                m = re.search(r'(?<=\s)u[\'"](?!\)|,|$)', code)
+                if m is not None:
+                    self.assertTrue(
+                        m is None,
+                        'u present in %s, around %s' % (
+                            fn, code[m.start() - 10:m.end() + 10]))
+
+
+if __name__ == '__main__':
+    unittest.main()